I am new to this, but I wanted to ask how it would be possible to convert a dB value into resistance. I've been looking at an isolated analog switch from http://www.ti.com/lit/ds/symlink/ts5a3359.pdf that has an OFF isolation value of -64dB at 2.5v (more on pg 10), and I need help converting this. I'd appreciate any help.

\$\begingroup\$So my understanding is that basically the "Off iso" is 50k Ω at 1Mhz, which comes from reactance of the 3pF cap and shunt 50Ω. Is that right? And this measurement is taken at the intersection between the 3pF & 50Ω resistor correct?\$\endgroup\$
– Alex FengJun 6 '18 at 4:17

\$\begingroup\$Yes. That is correct.\$\endgroup\$
– analogsystemsrfJun 9 '18 at 3:59